Two-electron exchange interaction between polar molecules and atomic ions – Asymptotic approachOleksandr M. Karbovanets, Myroslav I. Karbovanets, Mykhaylo V. Khoma and Volodymyr Yu. LazurEur. Phys. J. D, 69 4 (2015) 94DOI: https://doi.org/10.1140/epjd/e2015-50784-5